Making Chicken and Potato Casserole is straightforward if you follow these clear steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Ingredients: Slice the potatoes and season the chicken breasts with garlic powder, onion powder, paprika, salt, and pepper.
3. Sauté Chicken: In a skillet, heat olive oil over medium heat. Sear the chicken breasts for about 3-5 minutes on each side until they turn golden brown. Remove them from the skillet and set aside.
4. Layer the Dish: In a greased casserole dish, layer half of the sliced potatoes at the bottom. Sprinkle with half of the salt and pepper.
5. Add Chicken: Place the seared chicken breasts over the potato layer.
6. Prepare Sauce: In a bowl, mix the sour cream and chicken broth until combined. Pour the mixture over the chicken and potatoes.
7. Top with Potatoes: Arrange the remaining potato slices on top of the chicken and sauce.
8. Sprinkle Cheese: Top with the shredded cheddar cheese to create a delicious, cheesy layer.
9. Cover and Bake: Cover the casserole dish with aluminum foil and bake for 30 minutes. After 30 minutes, remove the foil and bake for an additional 15-20 minutes, or until the potatoes are tender and bubbly.
10. Garnish and Serve: Once baked, let it sit for 5 minutes. Garnish with fresh parsley if desired before serving.

These straightforward steps guide you in creating a beautiful and delicious Chicken and Potato Casserole that will wow your family and friends.